i have a 99 jeep cherokee classic 4.0l, it will not blow heat. have flusshed heater core. i took the blend door acctuator out and i can fell the door flip. i am not sure if the doors are broke but i can use a hanger to move them an get a little heat. but not sure what to do. is there a fix thats cheap. but any help will be great. and will the heater treater kit work on the classic.